Comparative Ultrasound Analysis of Two Hyaluronic Acid Dermal Fillers

Inclusion Criteria: * Subject with midface volume loss and contour deficiency * Ability of giving consent for participation in the study * Agreement to adhere to the procedures and requirements of the study and to report to the institute on the day(s) and at the time(s) scheduled for the assessments Exclusion Criteria: * History of allergy or hypersensitivity to lidocaine and/or injectable hyaluronic acid * Previous permanent or semi-permanent implant in proposed treatment area * Previous biodegradable tissue augmentation therapy in the proposed treatment area within 12 months prior to the baseline visit * History of other facial treatment/procedure at the study area (midface) in the previous 6 months that would potentially interfere with study injections (e.g., facial surgery, oral surgery, resurfacing, mesotherapy, lipolytic injections, botulinum toxin injections)